Carbureter.



H. L. CROUA'N.

CARBURETER.

APPLIU ATION rum) MAR. 18, 1912.

Patented Aug. 4, 19%

2 SHEETS-45215171 L [7W6 wean Crouim H. M. L. GROUAN GARBUBETEB. AYPLIDATION FILED MAB. 16, um.

Patented Aug. 4, 1914.

2 BEEETS SHEET Z,

UNITED STATES HENRY MARIE LEON CROtTAN, OF ASNIERES, Homer.

Specification of Letters Patent.

C'ARBURETER.

Patented Aug. '1, 1914.

Application filed March 18,1912. Serial No. 684,502.

To III/710111, it may cmm'rn Be it kn wn that I; llllNltY Mimi. Iii-Box;

(notinn a citizen of the French tepublic, and resident of Asnii-res. France. have in vented certain new and useful Improvcnu-nts in Carburetors, of which the following is a specification.

This invention relates toim 'irovements in carlmreters. and is designed primarily to provide means for increasing the effectiveness of the charge when the motor is running.

According to my present improvements, I provide means for supplying the gas in a carburetor with air under atmosphericv pres sure when the motor is running idle or when pulling a light load, but when the motor is pulling a load. means are provided for introducing air under pressure to the gas. and thet'means for admitting atmospheric air is automatically cut oil'.

The invention also relates to the means employed for regulating the admission of the air under pressure, to insure the proper mixture of the charge.

My invention also comprehends improvements in the details of construction and arrangement of parts. which will he hereinafter described and particularly pointed out in the claims.

In the drawings; Figure 1 is a vertical section of my improved carhureter; Fig. 2 is a.horizontal section of the same on the line A-F. of Fig. 1.

1 indicates the casing of my improved carbureter. and it is provided with a horizontal passage (2.7,through which the air and gas pass. Near one end of the casing is a vertically disposed valve seat, in which is mounted a valve 90, formed with an opening; 90, in the plane of the passage (25, and which is adapted to be brought into or out of registr therewith. A handle 91 serves as a means h v which the valve may be conveniently turned.

In the bottom of the casing is a duct 93, which communivates with the usual cylindrical gasolene rere 'itacle 80. by a port Extending upwardly from the bottom of the casing and disposed in the center of the valve 90. is a nozzle 25?. which communicates with the duct 93, and the horizontal passage 65. The oil is drawn through this nozzle from the+duet 93 and delivered to the pars "age 6:), where it is mixed with a supply of air by means to he described.

he gasolene receptacle 80, is supplied by 'a pipe 79, fitted with a coupling 78. The receptacle is provided with the usual iloat 81 for controlling the gasolene.

1 Extending from the bottom of the casing 1. and comnnmicating with the duct 93 and the assage 65, is a secondnozzle 84 for intro ucing an additional supply of oil. This nozzle is controlled by a. needle vzilveBG; which fits in the upper end of thenozzle. The upper end of the needle valve ishollow and receives a spring 87, to normally close the nozzle. The upper end ol the spring bears against a cap 88. threaded in the upper part of the casing. This cap also serves as a means for adjusting the tension of the spring.

77 indicates an opening in the bottom of the passage 65, and operating to close this opening is a valve 75, normally seated by a spring 76.

A hollow plug 94: is inserted in the casing 1 at a point about over the valve 75. The hollow plug is formed with a horizontal passage which registers with the passage 65 and its upper edge is provided with notches which form ports 93".

lit-low the ports 93*, the hollow plug is formed with ports 73 which register with ports in the casing 1. The casing is formed with a duct 7:2 leading to the recep-' tacle 80, above the float 81. A cap plate 92" fits over the casing and the'hollow plug 94 to cover the latter. Extending through the cap plate 92 and a handle 92. is a threaded stem Us). to the lower end of which attached the end of a spring 67, the lower end of the latter being secured to a cross bar 70. thumb nut 96, engages the threaded stem 9:) and bears on the handle 92 and serves as a means for adjusting the tension of the spring.

In operation, the motor creates a suction in the passage 65 which draws the gaseous fuel through the nozzle 83 and raises the valve 7.3'and admits a supply of air from the atmosphere, the charge being mixed and passing from the passage 65 in the direction of the arrow 14. This operation occurs when the engine is running idle, or when pulling a light load. but w en' the engine is pulling a heavy load, and an increased and enriched charge from the carburetori i neee. ar v. a pump (not shown) is started, and-a. "rdcr pressure is admitted to the passage 0. in the direction of the arrow 6, the inrush and onsequent pressure of the air will hold the valve 75 closed and will act on the lower portion of the needle valve 86 and compress the s ring 87 and open the nozzle 84 and there y admit a proportionate supply of liquid fuel which will mix with the air.

If the increased supply of airintroduced by the pump is in excess of that necessary to run the motor, the ports 73, 73", serve as vents. These vents may be regulated by turning the handle 92, so as to enable the operator to make the proper adjustment to produce the best results, while the air under pressure is admitted.

If for any reason, the supply of air introduced by the pump should suddenly increase to such an extent as would be detrimental to the carburetor, the p-2ssure acting on the cap plate 92" would cause the lattcr to be elevated against the tension of the spring 67, and the air would escape through the ports '93". By this means excess pressure'of the air will not have a detrimental efl'ect on the parts, nor will the proper mixture of the charge be destroyed.

The pressure of the air in the passage and over the float is uniform, due to the duct 72, as will be readily understood.

7 What I claim is 1. In a device of the character described, the combination of a casing formed with a horizontal passage, means for admitting to the passage liquid fuel, a valve for admitting atmospheric air to the passage, means for admitting air under pressure to the passage, and means operated by the increasedvair pressure and independent of the aforesaid liquid fuel admission means for introducing an increased supply of liquid fuel to thepassage.

2. In a device of the character described, the combination of a casing formed with a passage, means for admitting to the passage liquid fuel, a valve for admitting atmospheric air to the passage, means for admitting air under pressure to the passage and means independent TOf the aforesaid liquid fuel admission means for introducing an increased supply of liquid fuel to the passage, the increased air pressure serving to close the valve to prevent admission of air from the atmosphere.

3, In a device of the character described, the combination of a casing provided with a passage'and a fuel supply duct, a nozzle communicating with the supply duct and the passage, a second nozzle communicating with the supply duct and the passage, :1 yieldingly mounted valve normally closing the second mentioned nozzle, a valve for controlling the admission of air to the passage from the atmosphere, and means for supplying air under pressure to the passage, the pressure of the latter air acting on the i'ieldingly mounted valve to open the second rfnerlitioned nozzle to increase the charge of 4. In a device of the character described, the combination of a casing provided with a passage and a fuel supply duct, a nozzle communicating with the supply duct and thepassage, a second nozzle communicating with the supply duct and the assage, a yieldingly mounted valve norma 13'' closing the second mentioned nozzle, a valve for 'nozzle communicating with the duct and the passage, a valve in the passage, said valve being opened to admit air from the atmosphere when a charge of gas is drawn from the nozzle, a second nozzle communicating with the duct and the passage, 'a needle valve for closing the second mentioned nozzle, a spring actin on the needle valve to normally close the nozzle, means for admitting air under pressure to the flange, the increased air pressure acting on the needle valve opening the second men-,1 tioned nozzle, a hollow plug valve for regu-'" lating the pressure of air in the passe e, and means cooperating with the plug vii ve and operable by the air for relieving sudden or excess air pressurein the passage.

6. In an apparatus of the class described, the combination of a casing provided with a passage and a duct, a float-receptacle com- 05 municating with the duct, a float in the receptacle, the casing having aduct which communicates with the passage and the float receptacle above the top of the float, two nozzles communicating with the duct and the passage, a spring pressed valve for normally closing one of the nozzles, a valve to control air from the atmosphere to the passage, means for admitting air under pressure to the passage, means for regulating the pressure of the air in the passage, and means operable by the air in the passage for relieving sudden or excess pressure in the passage.

In testimony whereof I have hereuntoset my hand in presence of two witnesses.

HENRY MARIE LEON CROUAN,

\Vitnesses:

GEORGE E. LIGHT, A. DESGUIN. 

